I had kidney stone problem bt now I remove my all kidney stone stone in my both kidney 2 stone in right kidney n 2 stone in left kidney size varies from 3-4 mm all stone size .Silicon dioxide is common or not common? Max all type of stone contain calcium. So please tell me is silicon dioxide is harmful for body n which food is best for me that in future such kind of stone is not formed into my body? Thank you for your quick reply sir. My stone composition 90% silicon dioxide n 10 % calcium carbonate.